281338825 has 6 divisors (see below), whose sum is σ = 348860174. Its totient is φ = 225071040.

The previous prime is 281338823. The next prime is 281338847. The reversal of 281338825 is 528833182.

It can be written as a sum of positive squares in 3 ways, for example, as 36385024 + 244953801 = 6032^2 + 15651^2 .

It is not a de Polignac number, because 281338825 - 2¹ = 281338823 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (281338823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5626752 + ... + 5626801.

Almost surely, 2^281338825 is an apocalyptic number.

281338825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

281338825 is a deficient number, since it is larger than the sum of its proper divisors (67521349).

281338825 is a wasteful number, since it uses less digits than its factorization.

281338825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11253563 (or 11253558 counting only the distinct ones).

The product of its digits is 92160, while the sum is 40.

The square root of 281338825 is about 16773.1578720287. The cubic root of 281338825 is about 655.2543153232.

The spelling of 281338825 in words is "two hundred eighty-one million, three hundred thirty-eight thousand, eight hundred twenty-five".